Optical Reflection Element with Protective Beams for Z-Axis Impact Resistance
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Solution Overview
Problem
Conventional optical reflection elements for image projection devices face challenges in resisting impacts in the Z-axis direction, leading to damage from turbulent vibrations and external impacts, and existing solutions complicate assembly and downsizing due to the need for additional components and alignment accuracy.
Innovation Solution
The optical reflection element incorporates meandering-shaped vibration elements and protective beams that extend parallel to the vibration axis, providing enhanced resistance to impacts in the Z-axis direction by allowing elastic deformation and reducing the size and weight of the device, while maintaining accurate alignment and image projection capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protector is added to suppress vibrations in the Z-axis direction, then resistance to impact is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The protective function is merged with the existing frame structure by extending protective beams from the frame's confronting portions. This integration eliminates the need for separate protector components while maintaining impact suppression functionality in the Z-axis direction.
Solution Approach 2:
The frame structure is designed to serve multiple functions: it provides structural support, enables vibration in operating directions (X and Y axes through asperities), and now also provides protection against Z-axis impacts through the extended protective beams. This multi-functionality reduces the need for additional dedicated components.
2Reliability
If a protector is added to suppress vibrations in the Z-axis direction, then resistance to impact is improved, but alignment accuracy becomes more difficult to maintain
Solution Approach 1:
The protective beams are formed as an integrated part of the frame structure, eliminating the need for separate alignment procedures between independent components. The unified structure ensures consistent relative positioning while maintaining impact protection functionality.
3Volume of moving object
If the optical reflection element is downsized, then device compactness is improved, but resistance to large impacts deteriorates
Solution Approach 1:
The protective beams are designed with flexible, elongated structures that can elastically deform under impact loads. This flexibility allows compact design while maintaining impact resistance, as the beams can absorb energy through deformation rather than requiring large rigid structures.
Solution Approach 2:
The protective beams are pre-positioned to extend from the frame toward the vibration elements, creating a cushioning structure before impacts occur. This advance preparation allows the system to withstand impacts without requiring excessive size, as the protective geometry is optimized for energy absorption in a compact form.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design improves resistance to impacts in the Z-axis, reduces the size and weight of the optical reflection element, and maintains high accuracy in image projection by suppressing excessive vibrations and deformations, thus enhancing the mechanical reliability and downsizing of the device.
Implementation Method 1
First vibration elements 4 and 8 deform, and they even become damaged when the deformation exceeds their permissible level as a result of these vibrations
Data Source
AI summary
An optical reflection element has a frame, a pair of meandering-shaped vibration elements, a mirror having a reflection surface, and a pair of protective beams. The vibration elements have their respective outer ends supported by confronting portions of an inside of the frame. The vibration elements support the mirror with respective inner ends thereof. The protective beams extend from the respective confronting portions of the inside of the frame toward the mirror with a predetermined space from the vibration elements and in parallel with a vibration axis of the vibration elements.